Whirlwind Little IMP

Inline Low-impedance to High-impedance Mic Transformer with Female XLR Input and 1/4" TS Output
Whirlwind Little IMP image 1
Whirlwind Little IMP image 1
Sweetwater Savings: $5.00 MSRP: $24.99
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Whirlwind Little IMP
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Get the Most out of Your Mics and Mixers with This Handy Transformer!

The Whirlwind Little IMP inline transformer lets you take advantage of your mixer's input capabilities. Some mixers have 1/4" unbalanced inputs, which are designed for high-impedance sources and won't accept balanced, low-impedence mics. The Whirlwind Little IMP solves this problem, allowing you to attach your standard balanced XLR-style mic to its female XLR connection, while its 1/4" TS plug makes the connection to the hi-Z input efficiently and effectively. Now you can use your mics and mixer to their full potential with the Whirlwind Little IMP.

Whirlwind Little IMP Inline Microphone Transformer Features:
  • Female XLR to 1/4" TS plug
  • Allows using balanced XLR mics with unbalanced 1/4" high-impedance inputs
  • Easy to use
  • Durable construction
The Whirlwind Little IMP lets you get the most out of your mics and mixers!

Additional Media

Cable Buying Guide

Tech Specs

Manufacturer Part Number LTLIMP

Customer Reviews

Based on 3 reviews
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Perfect for the right situation

I've used these for years. They are tough and they do the job. Those who may be new to impedance transformers, note that in many situations it is better to buy a box that also has a ground lift switch (such as the IMP 2), as the ground lift can remove noise issues caused if your setup has a ground loop. The IMP 2 (and similar products) also includes a pass-through for when you want to run both high and low impedance from the same source. Note that both the IMP and IMP 2 are passive (not requiring a battery), which means that they do not have a control for compensating for volume. Again, the IMP is great for the right situation - it is solid, works perfectly and is inexpensive. One more note: There is a user comment from some years ago about the IMP affecting the volume. This is not a simple adapter, but an impedance transformer. If you're not sure what you need, talk to a sales tech at Sweetwater.
Music background: Creative Director / producer of audio for video, studio production, musician with occasional weekend gigs

Apogee Jam Mic solution

The "Whirlwind Little IMP" is not a pricey product, just $19.99 when I bought it, but is worth it's weight in gold for my use; maybe yours too if you're on a tight budget but want studio quality results. I'd bought an Apogee Jam to put guitar tracks in Garage Band, on my iPhone 5S, and was blown away by the studio sound quality (24 bit/48 kHz rocks). It sounded huge and very impressive played back on my car's Bluetooth stereo. I quickly decided to try it with a microphone and an XLR female/TR (mono) male cable. With a cheap First Act mic, and some GarageBand reverb, my vocal sounded pretty good. I then bought an industry standard Shure SM57, to mic a guitar cabinet, and it was just lousy. The cheap First Act sounded so much better that I thought my SM57 was bad. With research at the Apogee website, I found I needed something to convert a low impedance (low z) mic signal to high impedance (high z) guitar level for the Apogee Jam to really raise the mic output. THIS DEVICE DOES IT. My voice even sounded phenomenal with an SM57. I also recorded an acoustic guitar with the SM57 and it was very clear and impressive without being a condenser. The First Act mic now sounds like a toy in comparison. Under $20 to get studio quality recordings from your microphone, an Apogee Jam ($99) and an iPhone, that I already had, is just a no-brainer. Best money you'll spend this year. *To ensure a good signal chain, I also bought an under $20 Pro Co 10 foot XLR cable with my Whirlwind. It's a great cable, btw. I've heard that the next generation Apogee Jam (the chrome one, $129) records 48 kHz higher than mine, and replicates a tube circuit, making for an awesome interface. Probably my next purchase.
Music background: Singer/songwriter/guitarist/ keyboards since 1978

Great Applications for Mobile Use

So, I was experimenting with my iPad in learning how to utilize the little equipment I possess as my home studio. Mainly, I was trying to see how to use my mics on my iPad without having to buy another audio interface.I use an Apogee Jam on my iPad, fantastic little thing with a super clean signal path. I was sure that a clean preamp was just not only for guitar/bass, so I decided to see how to use Jam's input for my mics.While scouring around Sweetwater's site, I stumbled upon this little gem, the Whirlwind Little IMP. I read through the description and seeing that it was not just a XLR to 1/4 changeout, but an actual transformer to do the low to hi impedance change I decided to give it a try.The part arrived quickly as usual and promtly got my new signal path ready: mic, IMP, Jam, iPad. Guess what? Works like a champ!I did the customary A/B comparison using my old method (mic, audio interface, PC) and the new path and the differences are negligible with both my dynamic mics (Shure Omnisphere and Unidyne) and my tube mic (Groove Tubes GT66).So, with this little inline transformer, I'm able to keep the clutter to a minimum and still be able to use the mics I like, win-win.
Music background: Hobbyist, iOS Musician.
See also: Whirlwind, Whirlwind Adapters